feat: add getVersion service

Author: jiangwy

src/controllers/url.controller.ts

@@ -26,6 +26,10 @@ export class UrlController {
         }
     }
 
+    async getVersion(request: Request, env: Env): Promise<Response> {
+        return this.service.getVersion(request, env);
+    }
+
     async add(request: Request): Promise<Response> {
         try {
             const { long_url, serve } = await request.json<{ long_url: string; serve?: string }>();

src/index.ts

@@ -20,6 +20,7 @@ export default {
                 .get('/', req => showPage(req, env))
                 .get('/favicon.ico', () => new Response(null, { status: 200 }))
                 .get('/sub', req => controller.toSub(req, env))
+                .get('/version', req => controller.getVersion(req, env))
                 .post('/api/add', req => controller.add(req))
                 .delete('/api/delete', req => controller.delete(req))
                 .get('/api/queryByCode', req => controller.queryByCode(req))

src/services/url.service.ts

@@ -1,5 +1,6 @@
 import type { ShortUrl } from '../types';
 import { dump } from 'js-yaml';
+import { DEFAULT_CONFIG } from '../config';
 import { Confuse } from '../core/confuse';
 import { Restore } from '../core/restore';
 import { ResponseUtil } from '../shared/response';
@@ -49,6 +50,12 @@ export class UrlService {
         }
     }
 
+    async getVersion(request: Request, env: Env): Promise<Response> {
+        const { searchParams } = new URL(request.url);
+        const backend = searchParams.get('backend') ?? env.BACKEND ?? DEFAULT_CONFIG.BACKEND;
+        return Response.redirect(`${backend}/version`, 302);
+    }
+
     async add(long_url: string, baseUrl: string): Promise<ShortUrl> {
         if (!this.db) {
             throw new Error('Database is not initialized');